US4774149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidation-and hot corrosion-resistant nickel-base alloy coatings and claddings for industrial and marine gas turbine hot section components and resulting composite articles
Assignee: General Electric Co
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Filing: 1987-03-17
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Granted: 1988-09-27
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Expires: 2007-03-17
Abstract
Abstract New hot corrosion-and oxidation-resistant nickel-base alloys consisting essentially of about 40% chromium, 3% hafnium, 3% silicon, 0.2% yttrium, 0.5% titanium, up to 11% cobalt, remainder nickel are used to provide novel composite articles of nickel-base superalloy gas turbine hot section components having deposited coatings or bonded claddings of these protective alloys.
Inventors
- 👤 Marvin Fishman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:49
CPC Classifications
C; C23; C23C; C23C24/00; C23C24/08; C23C24/082; C23C24/085; C22; C22C; C22C19/00; C22C19/03; C22C19/05; C22C19/058; C23C4/00; C23C4/04; C23C4/06; C23C4/067; C23C4/073; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12771; Y10T428/12861; Y10T428/12944
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
42 words
An oxidation and hot corrosion-resistant composite article comprising of nickel-base superalloy gas turbine hot section component and a protective alloy covering bonded thereto consisting essentially of 30-44% chromium, 0.5-10% hafnium, 0.5-4% silicon, 0.1-1% yttrium, 0.3-3% titanium, up to 11% cobalt, remainder nickel.
Claim 2
Dependent Claim
42 words
An oxidation and hot corrosion-resistant composite article comprising of nickel-base superalloy gas turbine hot section component and a protective alloy covering bonded thereto consisting essentially of 30-44% chromium, 0.5-10% hafnium, 0.5-4% silicon, 0.1-1% yttrium, 0.3-3% titanium, up to 11% cobalt, remainder nickel.
Claim 3
Dependent Claim
16 words
An article of claim 1 in which the alloy covering is in the form of coating.
Claim 4
Dependent Claim
18 words
An article of claim 1 in which the covering is in the form of a spray deposited coating.
Claim 5
Dependent Claim
24 words
An article of claim 1 in which the covering is in the form of cladding bonded to the gas turbine hot section component substrate.
Claim 6
Dependent Claim
19 words
An article of claim 4 in which the cladding is bonded to the substrate body by hot isotatic pressing.
Claim 7
Dependent Claim
25 words
An article of claim 1 in which the alloy covering consists essentially of 38-42% chromium, 2.5-3.5% hafnium, 2-4% silicon, 0.1-0.3% yttrium, 0.3-1% titanium, remainder nickel.
Claim 8
Dependent Claim
27 words
An article of claim 1 in which the covering consists essentially of about 40% chromium, 3% hafnium, 3% silicon, 0.2% yttrium, 0.5% titanium, 10% cobalt, remainder nickel.
Claim 9
Dependent Claim
22 words
An oxidation-and hot corrosion-resistant alloy composition consisting essentially of 30-44% chromium, 0.5-10 % hafnium, 0.5-4% silicon, 0.1-1% yttrium, 0.3-3% titanium remainder nickel.
Claim 10
Dependent Claim
22 words
An oxidation-and hot corrosion-resistant alloy composition consisting essentially of 30-44% chromium, 0.5-10 % hafnium, 0.5-4% silicon, 0.1-1% yttrium, 0.3-3% titanium remainder nickel.
Claim 11
Dependent Claim
24 words
The alloy of claim 8 in which the alloy consists essentially of 38-42% chromium, 2.5-3.5% hafnium, 2-4% silicon, 0.1-0.3% yttrium, 0.3-1% titanium, remainder nickel.
Claim 12
Dependent Claim
20 words
The alloy of claim 8 consisting essentially of 40% chromium, 3% hafnium, 3% silicon, 0.2% yttrium, 0.5% titanium, remainder nickel.
Claim 13
Dependent Claim
8 words
The alloy of claim 8 containing 9-11% cobalt.
Claim 14
Dependent Claim
8 words
The alloy of claim 8 containing 10% cobalt.
Claim 15
Dependent Claim
28 words
The article of claim 1 in which the alloy covering consists essentially of about 40% chromium, 2.5% hafnium, 10% cobalt, 3% silicon, 2.5% titanium, 0.3% yttrium, remainder nickel.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-09-27 | 1992-03-28 | 1992-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-27 | 1996-03-28 | 1996-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-27 | 2000-03-28 | 2000-09-27 | $7700.00 | Window Closed / Lapsed |